Razor-stropper roll



W. M. HANSON. BAZOR STROPPER ROLL. APPLICATION man JULY 26. 1920.

1,396,424. Patented Nov. 8, 1921.

INVENTOR.

ATTORNEYS.

PATENT OFFICE.

WALTER M. HANSON, OF MILWAUKEE, WISCONSIN.

RAZOR-STROPPER ROLL.

Specification of Letters Patent.

Patented Nov. 8, 1921.

Application filed July 26, 1920. Serial No. 398,944.

To all whom it may concern:

Be it known that I, WVALTER M. HANSON, a citizen of the United States, residing at Milwaukee, county of Milwaukee and State of lVisconsin, have invented new and useful Improvements in Razor-stropper Rolls, of which the following is a specification.

This invention relates to razor stroppers and is particularly directed to the stropper roll.

One of the objects of this invention is to provide a razor stropper roll which is resilient and yet which does not deteriorate with age, as it is found, for example, in resilient rubber rolls which, whether they are used or not, gradually harden so that they are not suitable for further use.

Other objects are to provide a resilient stropper roll the resilient element of which may be composed of a single piece of spring steel of a shape easy of formation; which may be easily and readily covered with the abrading material, such for example, as leather; and to provide a simple and efficient means for holding the resilient steel member and abrasiy e covering in position upon the axle of the roller.

Other objects are to provide a razor stropper whose rolls are substantially duplicates and may be produced upon the same machines; to provide a razor stropper in which the stropper roll may be readily assembled both to form the roll itself and to position such roll within the device; and to provide a razor stropper roll in which the resilient element may be formed from fiat spring stock.

In general, it is my object to provide a stropper roll which may be successfully used in cooperation with another roll to strop a razor blade without bending the edge thereof.

An embodiment of the invention is shown in the accompanying drawings in which Figure 1 is a transverse section through the razor stropper.

Fig. 2 is a longitudinal sectional view thereof.

Fig. 3 is a view showing the razor stropper in open position.

Fig. 4 is a detail view of the synchronizing or timing device for the rolls.

Fig. 5 is a view of the axle and associated parts slightly separated to show the construction.

Fig. 6 is a view of the resilient element of the rolls.

This razor stropper, although shown as adapted for stropping safety razor blades, may also, by increasing the length and providing openings in the side walls, be adapted for stropping old-fashioned razor blades.

The razor stropper comprises a substantially cylindrical casing which is composed of two similar half sections 1 and 2 of pressed metal which are hingedly joined by means of a pintle 3 engaging alternate ears 4: and 5 formed upon the respective halves of the casing. The casing is therefore adapted to hinge about the pintle 3 and opens as shown in Fig. 3. It is held in closed position by means of a spring 6 riveted at 7 to the half section 1 and having an opening at the other end engaging over a projection 8 in the half section 2. The free end of this spring member may conveniently be turned outwardly as shown at 9 so that the thumb may be inserted under this outwardly turned lip to disengage the spring latch from the projection 8 when it is desired to open the casing. Also, in closing the casing, this lip rides over the projection 8 and the latch-snaps into place.

The pintle also has pivotally mounted thereona pair of jaws 10 and 11 which have alternate ears l6 and 17 through which the pintle passes. These jaws 10 and 11 have rear shoulders 12 and 13 and inwardly turned lips 14 and 15 between which the razor blade is adapted to be gripped. The jaws, and also the halves of the casing, are duplicates and may therefore be formed upon the same dies and presses. The inner surface of these jaws may be lined with felt if desired. These jaws are provided with thumb pieces 18 and 19 upon opposite sides so that they may be engaged by the thumbs of the user to open and close the jaws when positioning a blade therebetween. lVhen the casing is closed, the shoulders 12 and 13 are engaged by the inner portion of the casing and are forced inwardly, thereby causing the lips 14 and 15 to securely grip the razor blade.

The stropping rolls are substantially duplicates differing only in that one of the shafts is provided with a slight projection to engage the notch in the hub 20 of the driving crank 21 and is of slightly increased length. These rolls comprise a shaft 22 which is cut out so as to provide a section 23 of slightly less than half the diameter of the shaft and with square faces 24 at the ends of this narrowedsection. formed from a shaft of the same diameter is provided to fit between the faces 24 and to complete the shaft when in position. These members 23 and 25 are provided with holes 26 and 27 through which screws are adapted to pass to clamp these members together, one of such openings.beingthreaded. The resilient member for the roll comprises a piece of spring metal formed from flat spring stock" and provided with a substantially straight centralportion 28 which has holes 29 registering with the holes 26 and 27. This spring member is substantially S- shaped and has oppositely extending curved arms 80 which have ,inturnededges 31 forming a rounded outer portion 82. These arms 30 are similar and are formed upon a curve of a slightl increasing radius as the outer extremity of the arms is approached so that the-outer portion of the arms is a slightly greaterdistance from the axis of rotation thanthe inner portion of thearms. This spring steel member is covered with a leather sheet or tube 38 which is slipped over the member and has its ends joined as shown at 34, Fig. 1, by any suitable means, such for example, as stitching, and this joint is posi tioned towards the inner portion of the rolls away from its working surface. The driving shaft is provided with an extended portion36 which is equipped with a struckup projection 87 which projection is adapted to be engaged bythe face 38 of the notch formedin the hub 20 of the crank. It will be noted thatthe notch has an inclined face 89 upon its opposite side so that when reverse rotation is attempted,- the hub is disengaged from the projection 30 and the rolls arenot rotated. The crank 2l may conneniently be, formed with a crank pin 40 provided with a splitspring collar 41 which is slipped over the enlargedhead 42 and allowed to snap in place. 7 v i ,Motion is transmitted from one shaft to theother by means of a pair of similar gears 43 and 44 secured respectively uponthe two shafts; These gears 43 and 44 are secured upon a semi-circular casing 45, Fig. 5, by any suitable means, for example, they may be keyed on, crimped on, soldered, brazed, or welded. It is to be noted that the semicircular casing 45 is longer than themember 25- and that this casing fits outside of the cylindrical outline of the shaft. Also, it will be noted that the timing elements and gears are cut out as shown in Figs. 2 and 4 to accommodate this casing member, the remaining portion of the openings in such timing members and gears being in conformity with the cylindrical outline of the A section 25 shaft. It will also be noted that the casing member bears at its opposite edges upon the abrasive coated spring member and is thereby prevented from rotating. Thus the gears and timing members will be positively held in correct position upon the shaft independently of any soldering, brazing or welding and therefore it is apparent'that failure of such soldering, brazing or welding would not allow rotation of the members independently of the shaft. It will also be seen that this form of construction positively connects and positionsthe gear and timing element to the shaft independently of the soldering,

brazing or welding. At the other end of the casing,apair of interlocking members 46 are provided which have recesses 47 formed in one portion and diametrically opposite projections 48 adapted to. cooperate with the recess in the other member 46 so that rotation is prevented except when the projections are alined with the corresponding recesses. It will be noted that these members 46 are duplicates and are arranged upon the opposite ends of the shafts from that upon which the gears 43 and 44 are positionech Also as these members are made, each with one projection and one recess, the rolls may be properly alined by means of a slight motion of one of the shafts when the casing is being closed so that proper registry of the stropping surfaces of the two rolls is insured. .These members 46 are of course secured upon the casing 45 in a manner similar to thatinwhich the gears 43 and 44 are 50 adapted to accommodate here are positioned against the portion 23 of the shafts, and the portions 25 are then secured in position upon the opposite side by means of the screws 35. The partsare thenqsecurely locked in position upon the shafts. a i

The semi-circular end portions 51 of the casing may be formed either integral with the cylindrical sides or else may be secured thereto in any suitable manner, as by brazing, soldering, welding,- etc., and are of course provided with openings'for the shafts and may convenientlybe'inturned at such openings as shown at? 52 to provide su1table bearings therefor. 4

It will be seen that resilient rolls have been provided by this invention which do not deteriorate with age as would be the case with rubber rolls, and which may be used in a razor stropper adapted to strop both sides of a razor blade. It will also be seen that these resilient rolls are of simple formation, may be made from standard material, and will be efiicient in operation.

I claim:

1. A razor stropping roll comprising an axle, a spring member carried thereby and having oppositely projecting arms adapted to be flexed during the normal operation of the roll, and a stropping covering for said arms.

2. A stropping roll for a razor sharpener comprising an axle, an S-shaped spring member having its central portion extending through said axle, and having its outwardly projecting arms arranged upon opposite sides of said axle, and a stropping covering for said arms.

3. A razor stropping roll comprising a split axle, an S-shaped spring member carried within the split in said axle and having oppositely extending arms presenting a curved surface of gradually increasing ra dius, and an abrasive member carried by each of said arms.

4, A razor stropping roller comprising a rotatable shaft, said shaft having a removable portion extending a material length thereof, and an S-shaped spring member coextensive with said removable member and clamped between said removable member and the remaining portions of said shaft, said spring member having oppositely turned extremities, and a stropping covering arranged upon each of said extremities.

5. A razor stropping roll comprising a rotatable shaft formed in substantially half sections throughout a material portion of its extent, a resilient metal plate extending between said half sections, means passing through said plate for clamping said half sections and plate together, said plate having t ailing arms formed adjacent the oppositely projecting portions, and an abrasive covering carried by each of said trailing arms.

6. A resilient stropping roll for a razor stropper comprising a shaft, a resilient spring member carried by said shaft, means carried by said shaft for controlling the rotation of said shaft, and a substantially semicircular casing positioning said means upon said shaft and operatively connecting said means to said shaft.

7. A resilient stropper roll for razor sharpeners comprising a shaft, driving means mounted thereon, a resilient stropping member carried by said shaft, and a casing conforming to the contour of said shaft and operatively engaging said driving means and contacting with said stropping member and carried by said shaft, whereby independent motion of said driving means and shaft is prevented.

In testimony whereof I affix my signature in the presence of two witnesses.

WVALTER M. HANSON.

\Vitnesses A. J. MCKERIHAN, O. C. WEBER. 

